# Code 499 and ab tools **URL:** \ **Category:** NGINX\ **Created:** [September 27, 2012, 12:10pm UTC](https://www.ruby-forum.com/t/code-499-and-ab-tools/223274 "2012-09-27T12:10:35Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![aris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/258eb7/32.png) [@aris](https://www.ruby-forum.com/u/aris)\ **Post date:** [September 27, 2012, 12:10pm UTC](https://www.ruby-forum.com/t/code-499-and-ab-tools/223274/1 "2012-09-27T12:10:35Z")
HI, I am testing one of our production server with ab (ab -n 1000 -c 150 “[http://www.myserver.com](http://www.myserver.com)”) and what I get is: … Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests apr\_socket\_recv: Connection timed out (110) Total of 743 requests completed In the nginx’s error log no output, while in the nginx’s access log report 499 code (the client has closed the connection). Where is the problem, nginx server or client ab? Any idea? Thanks a lot – Andrea S. - Netbuilder S.r.l. Multidialogo : La storia e’ fatta da chi sa comunicare System Engineer // t. +39 0521 247791 // f. +39 0521 7431140 // www.netbuilder.it ---
**Author:** ![ascarp](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/eb8c5e/32.png) [@ascarp](https://www.ruby-forum.com/u/ascarp)\ **Post date:** [September 27, 2012, 11:16pm UTC](https://www.ruby-forum.com/t/code-499-and-ab-tools/223274/2 "2012-09-27T23:16:44Z")
Hi, try to increase the maximum number of open files on the server where you run the apache benchmark test. For example temporary “ulimit -u unlimited” Regards Frank * * * Von: removed\_email\_address@domain.invalid [removed\_email\_address@domain.invalid] im Auftrag von Andrea S. [removed\_email\_address@domain.invalid] Gesendet: Donnerstag, 27. September 2012 12:10 An: nginx Betreff: Code 499 and ab tools HI, I am testing one of our production server with ab (ab -n 1000 -c 150 “[http://www.myserver.com](http://www.myserver.com)”) and what I get is: … Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests apr\_socket\_recv: Connection timed out (110) Total of 743 requests completed In the nginx’s error log no output, while in the nginx’s access log report 499 code (the client has closed the connection). Where is the problem, nginx server or client ab? Any idea? Thanks a lot – Andrea S. - Netbuilder S.r.l. Multidialogo : La storia e’ fatta da chi sa comunicare System Engineer // t. +39 0521 247791 // f. +39 0521 7431140 // www.netbuilder.it * * * nginx mailing list removed\_email\_address@domain.invalid [http://mailman.nginx.org/mailman/listinfo/nginx](http://mailman.nginx.org/mailman/listinfo/nginx) ---
**Author:** ![ascarp](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/eb8c5e/32.png) [@ascarp](https://www.ruby-forum.com/u/ascarp)\ **Post date:** [September 28, 2012, 10:42am UTC](https://www.ruby-forum.com/t/code-499-and-ab-tools/223274/3 "2012-09-28T10:42:00Z")
Hi, I get the same error… In my sysctl.conf I set other parameters: net.ipv4.tcp\_fin\_timeout = 1 net.ipv4.tcp\_tw\_recycle = 1 net.core.rmem\_max = 16777216 net.core.rmem\_default = 16777216 net.core.netdev\_max\_backlog = 262144 net.core.somaxconn = 262144 net.ipv4.tcp\_syncookies = 1 net.ipv4.tcp\_max\_orphans = 262144 net.ipv4.tcp\_max\_syn\_backlog = 262144 net.ipv4.tcp\_synack\_retries = 2 net.ipv4.tcp\_syn\_retries = 2 Do you think the problem is on the server where I run tne apache benchmark? Thanks, Andrea ----- Messaggio originale ----- Da: “Frank Ruske” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) A: removed\_email\_address@domain.invalid Inviato: Giovedì, 27 settembre 2012 23:14:14 Oggetto: AW: Code 499 and ab tools Hi, try to increase the maximum number of open files on the server where you run the apache benchmark test. For example temporary “ulimit -u unlimited” Regards Frank * * * Von: removed\_email\_address@domain.invalid [removed\_email\_address@domain.invalid] im Auftrag von Andrea S. [removed\_email\_address@domain.invalid] Gesendet: Donnerstag, 27. September 2012 12:10 An: nginx Betreff: Code 499 and ab tools HI, I am testing one of our production server with ab (ab -n 1000 -c 150 “[http://www.myserver.com](http://www.myserver.com)”) and what I get is: … Completed 400 requests Completed 500 requests Completed 600 requests Completed 700 requests apr\_socket\_recv: Connection timed out (110) Total of 743 requests completed In the nginx’s error log no output, while in the nginx’s access log report 499 code (the client has closed the connection). Where is the problem, nginx server or client ab? Any idea? Thanks a lot – Andrea S. - Netbuilder S.r.l. Multidialogo : La storia e’ fatta da chi sa comunicare System Engineer // t. +39 0521 247791 // f. +39 0521 7431140 // www.netbuilder.it * * * nginx mailing list removed\_email\_address@domain.invalid [http://mailman.nginx.org/mailman/listinfo/nginx](http://mailman.nginx.org/mailman/listinfo/nginx) * * * nginx mailing list removed\_email\_address@domain.invalid [http://mailman.nginx.org/mailman/listinfo/nginx](http://mailman.nginx.org/mailman/listinfo/nginx)